Customer.io MCP Server

This server exposes the Customer.io Journeys App API as MCP tools for use with Claude, Cursor, and other MCP-compatible clients.

Generate an App API Key

  1. Go to Account Settings → API Credentials in Customer.io.
  2. Click the button to add a new set of credentials.
  3. Give it a name (e.g. “MCP Server”) and select your workspace.
  4. Copy the key immediately — App API Keys are shown only once and stored as hashed values.

Requires the Account Admin or Member role with “Manage API credentials” permission.

Connect

Claude Desktop

{
  "mcpServers": {
    "customerio": {
      "url": "https://customer-io-mcp.thesweetspot.com/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_APP_API_KEY"
      }
    }
  }
}

Claude Code (CLI)

claude mcp add --transport=http \
  --header="Authorization: Bearer YOUR_APP_API_KEY" \
  customerio https://customer-io-mcp.thesweetspot.com/mcp